7f55632881d76c3a7aa101775cf0d02e72cb7a60
[platform/framework/web/crosswalk.git] / src / xwalk / application / common / package / xpk_package.cc
1 // Copyright (c) 2013 Intel Corporation. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "xwalk/application/common/package/xpk_package.h"
6
7 #include <string>
8
9 #include "base/file_util.h"
10 #include "base/files/scoped_file.h"
11 #include "crypto/signature_verifier.h"
12 #include "xwalk/application/common/id_util.h"
13
14 namespace xwalk {
15 namespace application {
16
17 const uint8 kSignatureAlgorithm[15] = {
18   0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
19   0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00
20 };
21
22 const char XPKPackage::kXPKPackageHeaderMagic[] = "CrWk";
23
24 XPKPackage::~XPKPackage() {
25 }
26
27 XPKPackage::XPKPackage(const base::FilePath& path)
28     : Package(path) {
29   if (!base::PathExists(path))
30     return;
31   manifest_type_ = Manifest::TYPE_MANIFEST;
32   scoped_ptr<base::ScopedFILE> file(
33       new base::ScopedFILE(base::OpenFile(path, "rb")));
34   file_ = file.Pass();
35   size_t len = fread(&header_, 1, sizeof(header_), file_->get());
36   is_valid_ = false;
37   if (len < sizeof(header_))
38     return;
39   if (!strncmp(XPKPackage::kXPKPackageHeaderMagic, header_.magic,
40                sizeof(header_.magic)) &&
41       header_.key_size > 0 &&
42       header_.key_size <= XPKPackage::kMaxPublicKeySize &&
43       header_.signature_size > 0 &&
44       header_.signature_size <= XPKPackage::kMaxSignatureKeySize) {
45     is_valid_ = true;
46     zip_addr_ = sizeof(header_) + header_.key_size + header_.signature_size;
47     fseek(file_->get(), sizeof(header_), SEEK_SET);
48     key_.resize(header_.key_size);
49     size_t len = fread(&key_.front(), sizeof(uint8), header_.key_size,
50         file_->get());
51     if (len < header_.key_size)
52       is_valid_ = false;
53
54     signature_.resize(header_.signature_size);
55     len = fread(&signature_.front(), sizeof(uint8), header_.signature_size,
56         file_->get());
57     if (len < header_.signature_size)
58       is_valid_ = false;
59
60     if (!VerifySignature())
61       is_valid_ = false;
62
63     std::string public_key =
64         std::string(reinterpret_cast<char*>(&key_.front()), key_.size());
65     id_ = GenerateId(public_key);
66   }
67 }
68
69 bool XPKPackage::VerifySignature() {
70 // Set the file read position to the beginning of compressed resource file,
71 // which is behind the magic header, public key and signature key.
72   fseek(file_->get(), zip_addr_, SEEK_SET);
73   crypto::SignatureVerifier verifier;
74   if (!verifier.VerifyInit(kSignatureAlgorithm,
75                            sizeof(kSignatureAlgorithm),
76                            &signature_.front(),
77                            signature_.size(),
78                            &key_.front(),
79                            key_.size()))
80     return false;
81   unsigned char buf[1 << 12];
82   size_t len = 0;
83   while ((len = fread(buf, 1, sizeof(buf), file_->get())) > 0)
84     verifier.VerifyUpdate(buf, len);
85   if (!verifier.VerifyFinal())
86     return false;
87
88   return true;
89 }
90
91 bool XPKPackage::ExtractToTemporaryDir(base::FilePath* target_path) {
92   if (is_extracted_) {
93     *target_path = temp_dir_.path();
94     return true;
95   }
96
97   if (!IsValid()) {
98     LOG(ERROR) << "The XPK file is not valid.";
99     return false;
100   }
101
102   return Package::ExtractToTemporaryDir(target_path);
103 }
104
105 }  // namespace application
106 }  // namespace xwalk